Lily Lake is an impoundment and natural lake in Luzerne County, Pennsylvania, in the United States. It has a surface area of approximately 160 acres and is situated on Pond Creek. It is a natural glacial lake in Slocum Township and Conyngham Township. The lake is listed on the Luzerne County Natural Areas Inventory. It is inhabited by eleven sp…Lily Lake is an impoundment and natural lake in Luzerne County, Pennsylvania, in the United States. It has a surface area of approximately 160 acres and is situated on Pond Creek. It is a natural glacial lake in Slocum Township and Conyngham Township. The lake is listed on the Luzerne County Natural Areas Inventory. It is inhabited by eleven species of fish, including alewives and bluegills. The lake has one boat launch.